... coble oar扁阔型短桨 stroke oar(舢板)领桨(左舷最后端的桨手) oar leather桨革 ...
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In order to test the crack of the stroke oar leafs crossbeam of a certain helicopter, we need to design a special transverse wave probe.
为了检测某型直升机尾桨叶大梁的裂纹，需要设计专用横波探头。
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